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48 lines
1.5 KiB
48 lines
1.5 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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* Android BPF library - public API
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <libbpf.h>
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#include <linux/bpf.h>
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#include <log/log.h>
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#include <android-base/properties.h>
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namespace android {
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namespace bpf {
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// BPF loader implementation. Loads an eBPF ELF object
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int loadProg(const char* elfPath, bool* isCritical, const char* prefix = "");
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// Exposed for testing
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unsigned int readSectionUint(const char* name, std::ifstream& elfFile, unsigned int defVal);
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// Wait for bpfloader to load BPF programs.
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static inline void waitForProgsLoaded() {
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// infinite loop until success with 5/10/20/40/60/60/60... delay
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for (int delay = 5;; delay *= 2) {
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if (delay > 60) delay = 60;
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if (android::base::WaitForProperty("bpf.progs_loaded", "1", std::chrono::seconds(delay)))
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return;
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ALOGW("Waited %ds for bpf.progs_loaded, still waiting...", delay);
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}
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}
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} // namespace bpf
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} // namespace android
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